Customers complaint, no light up of the code reader when fitted to the 16 way plug,

Ok to start pin 16 is the 12v supply at the 16 way port, we have found fuses missing within the fuse box, so this is the best place to start.

Like i said the fuse is missing in the fuse box at the side of the O/S daeh, fuse number 12, now we have a supply to pin 16 of the dia port, and the reader is working , well maybe till you read the codes.